Lock-nut mechanism.



J. PERRIE.

LOOK NUT MEOHANISM.

APPLIGATION FILED NOV. 15, 1909.

959,162. Patented May 24,1910.

--a longitudinal 1 direction.

PATENT ()FFICE.

JOHN renew or Maryann trainers- LOOK-NUT nenenrsn.

mama.

Specification of Letterslatent.

r ieat an yaa 1.9.1

zTo all whom it may conce n:

B it sknown that I, ,JoHn Banana, a resident of Roseland, in ztheicounty of i(look (and State ,of Illinois, have invented certain new anduseful lmproyementsinliock-Nut Mechanism,;0f Which the ,followingis a ;full,,clear, and sprecisevspecification.

My invention relates .to lock nut mechan- .ismand contemplates \improved construction and operation thereof.

Among the important obj of my inmention are to provide .an arrangement in avhicha main nut-remains in standard form and ,retains its 1 fullefiiciency ;but is ,provided with an .extension forming-an integral part thereof; to provide a fiexiblesupplemental :nut fortcooperating with theextension on ithe main nut whereby both vmain and supplezmentalinutsru on application to a bolt will l-mutuallymigi lyilock themselveslto the bolt; :to provide .such construction and arrangement :that the application of the main and supplemental :nuts will rnot injure the bolt :threads to provide a [construction in which the supplemental nut Will always maintain lits grippingiengagement avith, and position .;on, :the :bolt, irrespective of loosening of the gnainnutdue to :shrinkageor other move- ,ment ofithe worlrto beisecured to provide such arrangement that upon loosening .of the main nut theisupplemental nut can vbe Trerset and drawn .up against the main nut to resume docking conditions; to provide such construction and arrangement that the rnain and supplemental nuts can be readily and inexpensively manufactured by machinery and in general to produce more simple and more reliable locknut mechanism.

tln general my invention comprises a main .nut of "standard ifOlEl'Il having an annular flange protruding irom its outer face and surrounding an annular pocket, 1 and a supplemental comparatively thin and vflexible ,nut which avhen applied to l3l18lbQll3ill-1fdClS will abut against the flange end to .haveiits outer section deflected outwardly and its -inner section drawn .into i the: annular pocket, suchlengageinent causing firm clamping/enf gagement 0f "the supplemental .nut threads with -the 'boltl-threads bothain a'radial and 1=My invention is described more in detail in the {following specification and illustrated on the accompanying drawing, .in which; drawing- Figure l is an elevation viewofa :nut with 3 my imp oved look nut mechanism appl ed thereto to secu tw pla es together, igs view ro th righ end a o .E g a :Fig- .3 is a rerti a diametra s cti na vi w of the z-p l tfi hown in Big 11, .Eigis plan view of :the locking and o he ma nut, :Eig. 5 is :a 1 plan an w o th supplement nu showing its prima y do m, Fig. as se tional view itake on plan 676, Big. Fig- 27 is-aside ele ation gotta mod fied for-m o main nut, 8 is a a iQ of the looking xfaceof the nut ;in Fig/7, and Eig. .9 isa sec- ;tional view taken on plan fiwflfll g- .8-

Referring to Figs. :1 we, th main nu lisp-1E standard forinlexcept thatan lar flange 2 is provided at its Q1936 30 theinuei' iparttojclthis flangeibcing cut away to ileavo an annular ocket :13 with a more .or :less po ntedouter. end A he oute su ace of ithe efiange ;being substantially cylindrical andisome distance-Within itheouter sur aces of lthe nut. Referring to jl ligs. :5 and 6, .the supplemental nuta is .prin arily fiat and has internal thi'eadsgfi. ilfteferringto Figs. 1 and 2, a :bolt 1:7 is applied through ,vobjects -8.and-9 t0 be clamped together. {Elie main ;nut i1 is (first ,applied to the {bolt threads -10 and is drawn jup ltightly against :the ob- -jects. lllhe supplemental a ut is than plied .to :the bQl-t =threadS and draw up tightly against the annular ,end A pf Ithe flangefl. Engagement of h ccn A: Wi h theesupplementalulut isalonga line between .the threads 6 ,and:the;outerperiphery, ofithe supplemental nut, and the result ,ot such engagement and tightening of ,the nut is to cause fiexure of thenut theouter section 6 deflecting outwardly and ,the inner se :tion 6 being drawn inwardly into the pocket 3,.2LSsl1QW1 thisifie xureiand disto ;ti0n of the nutt'causing ,radial contraction iofvthemutf'to-sbring its threads 61int0 power- ;ful .-.cla1nping engagement wit the lbQl threads :10, and this .l'adial contraction is uniform in i all directions so that thetthre-ads 1O avill .not be distorted ior injured. :Besides. this= radial clamping of the bolt: threads .upon radial contraction of the nut the threads 6 will {also :have powerful clamping engagement with the bolt: threadsin a longiitu dinala directionowing t0 1 the drawing Dt pocket 8 f of the inner ,section a 4 ct: thesupplemental nut. Elhe radial clamping iieo exertedz by i the nut increases from I the inside rtovthe outsideofgthenut. -Slight movement of :the main nut'as uponshfinkage or -dis placement of the objects 8 and 9 will be followed by the supplemental nut, owing to its elasticity, but this compensating movement of the supplemental nut will not materially weaken this clamping engagement with the bolt, as the inner ends of the threads of the nut will come into firmer clamping engagement with the bolt threads, the distribution of the clamping force being changed but the net clamping effort remaining constant. The supplemental nut, therefore, always retains its position on the bolt and will prevent escape of the main nut from the bolt. If the main nut should become very much loosened and beyond a limit within which the supplemental nut would compensate, the supplemental nut would then have to be drawn up farther and re-set into locking engagement with the main nut. Thus slight loosening or displacement of the main nut will be compensated for by the supplemental "can readily be re-set to restore the looking conditions. The main nut and supplemental nut can have the same outer dimen sions so that the same wrench or other too-l can be used for both. By having the flange 2 within the faces of the nuts an annular clearance space 11 is provided for the tightening tool so that both nuts can be drawn up in most efficient manner. The outer faces 12 of the supplemental nut will, of course, incline as the nut is drawn into locking engagement, but the wrench or other tool can be prevented from slipping ofl by being applied to the inner edges 13 of the supplemental nut, such application being permitted by the ample clearing space 11.

Referring to Ifiigs. 7, 8 and 9, the outer face of the flange 2 instead of being all within the nut faces can taper gradually from the nut faces to the end 4 of the flange, and instead of the annular pocket 8 having a triangular cross-section, as shown in Fig.

3, the cross-section can be rectangular, as

' best shown in Fig. 9. Both the main and the supplemental nuts can, of course, be square or hexagonal or of any other peripheral form. The full eflicient use of the main nuts in their ordinary capacity is in no wise impaired and the nut can be applied either with its base or with the flange against the work to be secured. Both main and supplemental nuts can also be readily and inexpensively manufactured by machinery.

I do not wish to be limited to the precise forms of nuts which I have shown, as modifications could readily be made which would still come within the scope of my invention whose main feature is the provision of annular projection on the main nut forming a I 1 pocket and for being engaged at its end by a flexible supplemental nut to cause flexure of the supplemental nut and thereby clamping engagement both in a radial and longitudinal direction with the bolt.

I, therefore, desire, to secure the following claims/by Letters Patent. 7 1. In lock nut mechanism, the combination of a main nut, an annular flange extending from one face of said main nut and forming an annular pocket, and a flexible supplemental nut for abutting along a circular line against the outer end of said flange to be deflected thereby when said main and supplemental nuts are applied to a bolt.

2. In combination, a bolt, a main nut engaging said bolt, a circular projection from one face of said main nut, and a comparatively thin flexible supplemental nut abutting against the end of said projection and deflected by such abutting engagement to force its threads radially in all directions into clamping engagement with the bolt.

3. In lock nut mechanism, the combination of a main nut, an annular flange extending from one face of the main nut and forming the outer wall of an annular pocket when the nut is applied to a bolt, and a comparatively thin, flexible supplemental nut, said supplemental nut being primarily flat and adapted when applied to the bolt to engage along a circular line with the end of said flange, and when drawn forcibly against the end of said flange to be dished to thereby both radially and longitudinally uniformly clamp said bolt to lock itself and the main nut to the bolt.

4. In lock nut mechanism, the combination of a main nut, an annular flange extending from one face of the main nut and forming the outer wall of an annular pocket when the main nut is applied to a bolt, and a primarily flat comparatively thin and flexible supplemental nut threaded to receive the bolt and to be drawn up forcibly against the outer end of said flange, engagement of said flange with said supplemental nut causing the entire outer section of the supplemental nut to be uniformly deflected outwardly and the entire inner section thereof to be uniformly drawn into said pocket whereby said supplemental nut will securely clamp the bolt uniformly at all points in a radial direction and will exert longitudinal clamping pressure against the bolt and the main nut to thereby securely lock itself and the main nut to the bolt.

5. In lock nut mechanism, the combination of a main nut having a threaded central opening for receiving a bolt, an annular flange extending from one face of the nut at a point intermediate said threaded opening and the outer faces of the nut and having a comparatively sharp outer end, and a comparatively thin and flexible supplemental nut having a central threaded opening for receiving a bolt, said supplemental nut being primarily flat, said, supplemental nut when applied to the bolt abutting against my name this 13th day of November A. D. the end of said flange to be dished outwardly 1909. to uniformly clamp the bolt at all points in a radial direction and in a longitudinal di- 5 rection to lock itself and the main nut se- WVitnesses:

curely to the bolt. CHARLES J. SCHMIDT,

In Witness hereof, I hereunto subscribe NELLIE B. DEARBORN.

JOHN PERRIE. 

